What is already too late to plant in Central Maryland this year?

Arugula, Bush bean, Beet, Bok choy, Broccoli, Brussels sprouts, Cabbage, Muskmelon, Carrot, Cauliflower, Swiss chard, Collards, Slicing cucumber, Eggplant, Kale, Kohlrabi, Leek, Leaf lettuce, Mustard greens, Okra, Parsley, Parsnip, Snap pea, Sweet pepper, Pumpkin, Radish, Rutabaga, Spinach, Winter squash, Winter squash, Sweet corn, Tomatillo, Tomato, Turnip, Watermelon. The UMD Extension fall window for arugula in Central Maryland closed on Sep 30, 9 days ago, so Astro Arugula is too late to sow this year: it needs 35 days, and a sowing today matures around Nov 13, 27 days after the median first frost of Oct 17 at Baltimore/Washington International Airport (BWI); this catalog lists arugula as frost tolerant, so the crop is harvested through light frost rather than lost to it.

Plant now

What can I still plant in Central Maryland right now?

Dense rows of young leafy greens glowing in low morning sunlight

NOAA/NCEI, FREEZE/FROST DATA - CLIM20 supp no. 1, Maryland puts the median first frost for Baltimore/Washington International Airport (BWI) on Oct 17 at a 36 F threshold, period of record 1971-2000, per the dataset file 9712_frz_prob_1971-2000 in the same NCEI directory; the state PDF itself prints no period of record. That leaves 8 days of runway from today. Of the 35 catalog varieties UMD Extension covers for Central Maryland, 0 are still worth sowing, 35 are already too late this year, and 0 have not opened yet.

Example plan calculated October 9, 2026. Open the planner for dates recalculated for today.

UMD Extension publishes these windows by month, not by day. Read a window such as September to March as month-level guidance; the only day-level deadlines on this page are the ones computed from the frost date, and each of those says so. The UMD Extension planting calendar is written for Central Maryland - the Baltimore-Washington corridor and the counties around it. UMD states that Western, Northern and Southern Maryland and the Eastern Shore need timeline adjustments, and that Maryland frost-free growing days range from 155 in the far western counties to 230 on the Lower Eastern Shore, so these dates are not a statewide rule. Two UMD artifacts of the same calendar disagree on its frost assumption: the web page updated August 3, 2026 states April 15 and October 25, while the March 2026 PDF states May 1 and October 31.

Calculated for Baltimore/Washington International Airport (BWI). This catalog carries 6 frost sites for Central Maryland; each one publishes its own measurement, and opening this page with JavaScript lets you pick another.

Nothing is open for sowing today

No UMD Extension planting window for Central Maryland is open on October 9, 2026. This page ranks the planting windows UMD Extension publishes for Central Maryland against the median first frost, so between the last of those windows closing and the next one opening there is nothing here to sow. The next UMD Extension window for this region opens in March 2027. Use the planting calendar to work a sowing date out from your own frost dates, or open the Central Maryland regional guide for what this region grows in between.

Planting Calendar Tool Work a sowing date out from your own frost dates
Central Maryland regional guide Climate signals, planning notes, and priority crops for this region

Frost runway

Frost runway for Central Maryland: 4 crops sown today, plotted against the median first frost. Calculated for October 9, 2026.

Still worth sowing

No crop in the UMD Extension list for Central Maryland is still worth sowing on this date.

Already too late this year

These are the crops the calendar has already closed on. The reason is the one the planner itself computed, and the second line shows the arithmetic behind it.

35 varieties that have run out of season in Central Maryland as of October 9, 2026.
Crop	Why it is too late
Astro ArugulaArugula · 35 days to maturity	The UMD Extension fall window for arugula in Central Maryland closed on Sep 30, 9 days ago, so Astro Arugula is too late to sow this year: it needs 35 days, and a sowing today matures around Nov 13, 27 days after the median first frost of Oct 17 at Baltimore/Washington International Airport (BWI); this catalog lists arugula as frost tolerant, so the crop is harvested through light frost rather than lost to it. The UMD Extension window closed on Sep 30, 9 days ago, and that is why this row is here. The frost arithmetic behind it: 35 days to maturity: a sowing today is ready around Nov 13, 27 days after frost, harvested through light frost. Median first frost Oct 17 at Baltimore/Washington International Airport (BWI).
Provider Bush BeanBush bean · 50 days to maturity	The UMD Extension published window for bush bean in Central Maryland ran May 1 to Aug 7 and closed 63 days ago, so Provider Bush Bean is too late to sow this year; the window opens again in May. The UMD Extension window closed on Aug 7, 63 days ago, and that is why this row is here. The frost arithmetic behind it: 50 days to maturity: a sowing today is ready around Nov 28, 42 days after frost. Median first frost Oct 17 at Baltimore/Washington International Airport (BWI).
Detroit Dark Red BeetBeet · 58 days to maturity	The UMD Extension published window for beet in Central Maryland ran Apr 1 to Jul 31 and closed 70 days ago, so Detroit Dark Red Beet is too late to sow this year; the window opens again in April. The UMD Extension window closed on Jul 31, 70 days ago, and that is why this row is here. The frost arithmetic behind it: 58 days to maturity: a sowing today is ready around Dec 6, 50 days after frost, harvested through light frost. Median first frost Oct 17 at Baltimore/Washington International Airport (BWI).
White Stem Bok ChoyBok choy · 45 days to maturity	The UMD Extension fall window for bok choy in Central Maryland closed on Sep 7, 32 days ago, so White Stem Bok Choy is too late to sow this year: it needs 45 days, and a sowing today matures around Nov 23, 37 days after the median first frost of Oct 17 at Baltimore/Washington International Airport (BWI); this catalog lists bok choy as frost tolerant, so the crop is harvested through light frost rather than lost to it. The UMD Extension window closed on Sep 7, 32 days ago, and that is why this row is here. The frost arithmetic behind it: 45 days to maturity: a sowing today is ready around Nov 23, 37 days after frost, harvested through light frost. Median first frost Oct 17 at Baltimore/Washington International Airport (BWI).
Waltham 29 BroccoliBroccoli · 74 days to maturity	The UMD Extension fall window for broccoli in Central Maryland closed on Jul 10, 91 days ago, so Waltham 29 Broccoli is too late to sow this year: it needs 74 days, and a sowing today matures around Dec 22, 66 days after the median first frost of Oct 17 at Baltimore/Washington International Airport (BWI); this catalog lists broccoli as frost tolerant, so the crop is harvested through light frost rather than lost to it. The UMD Extension window closed on Jul 10, 91 days ago, and that is why this row is here. The frost arithmetic behind it: 74 days to maturity: a sowing today is ready around Dec 22, 66 days after frost, harvested through light frost. Median first frost Oct 17 at Baltimore/Washington International Airport (BWI).
Long Island Improved Brussels SproutsBrussels sprouts · 100 days to maturity	The UMD Extension published window for brussels sprouts in Central Maryland ran May 1 to May 31 and closed 131 days ago, so Long Island Improved Brussels Sprouts is too late to sow this year; the window opens again in May. The UMD Extension window closed on May 31, 131 days ago, and that is why this row is here. The frost arithmetic behind it: 100 days to maturity: a sowing today is ready around Jan 17, 2027, 92 days after frost, harvested through light frost. Median first frost Oct 17 at Baltimore/Washington International Airport (BWI).
Golden Acre CabbageCabbage · 64 days to maturity	The UMD Extension fall window for cabbage in Central Maryland closed on Jul 15, 86 days ago, so Golden Acre Cabbage is too late to sow this year: it needs 64 days, and a sowing today matures around Dec 12, 56 days after the median first frost of Oct 17 at Baltimore/Washington International Airport (BWI); this catalog lists cabbage as frost tolerant, so the crop is harvested through light frost rather than lost to it. The UMD Extension window closed on Jul 15, 86 days ago, and that is why this row is here. The frost arithmetic behind it: 64 days to maturity: a sowing today is ready around Dec 12, 56 days after frost, harvested through light frost. Median first frost Oct 17 at Baltimore/Washington International Airport (BWI).
Hale's Best Jumbo MelonMuskmelon · 85 days to maturity	The UMD Extension published window for muskmelon in Central Maryland ran May 15 to Jun 15 and closed 116 days ago, so Hale's Best Jumbo Melon is too late to sow this year; the window opens again in May. The UMD Extension window closed on Jun 15, 116 days ago, and that is why this row is here. The frost arithmetic behind it: 85 days to maturity: a sowing today is ready around Jan 2, 2027, 77 days after frost. Median first frost Oct 17 at Baltimore/Washington International Airport (BWI).
Danvers 126 CarrotCarrot · 70 days to maturity	The UMD Extension published window for carrot in Central Maryland ran Jun 15 to Jul 31 and closed 70 days ago, so Danvers 126 Carrot is too late to sow this year; the window opens again in June. The UMD Extension window closed on Jul 31, 70 days ago, and that is why this row is here. The frost arithmetic behind it: 70 days to maturity: a sowing today is ready around Dec 18, 62 days after frost, harvested through light frost. Median first frost Oct 17 at Baltimore/Washington International Airport (BWI).
Snowball Y CauliflowerCauliflower · 70 days to maturity	The UMD Extension fall window for cauliflower in Central Maryland closed on Jun 30, 101 days ago, so Snowball Y Cauliflower is too late to sow this year: it needs 70 days, and a sowing today matures around Dec 18, 62 days after the median first frost of Oct 17 at Baltimore/Washington International Airport (BWI); this catalog lists cauliflower as frost tolerant, so the crop is harvested through light frost rather than lost to it. The UMD Extension window closed on Jun 30, 101 days ago, and that is why this row is here. The frost arithmetic behind it: 70 days to maturity: a sowing today is ready around Dec 18, 62 days after frost, harvested through light frost. Median first frost Oct 17 at Baltimore/Washington International Airport (BWI).
Bright Lights Swiss ChardSwiss chard · 55 days to maturity	The UMD Extension published window for swiss chard in Central Maryland ran Apr 15 to Jul 21 and closed 80 days ago, so Bright Lights Swiss Chard is too late to sow this year; the window opens again in April. The UMD Extension window closed on Jul 21, 80 days ago, and that is why this row is here. The frost arithmetic behind it: 55 days to maturity: a sowing today is ready around Dec 3, 47 days after frost, harvested through light frost. Median first frost Oct 17 at Baltimore/Washington International Airport (BWI).
Georgia Southern CollardsCollards · 65 days to maturity	The UMD Extension published window for collards in Central Maryland ran Jun 1 to Jul 10 and closed 91 days ago, so Georgia Southern Collards is too late to sow this year; the window opens again in June. The UMD Extension window closed on Jul 10, 91 days ago, and that is why this row is here. The frost arithmetic behind it: 65 days to maturity: a sowing today is ready around Dec 13, 57 days after frost, harvested through light frost. Median first frost Oct 17 at Baltimore/Washington International Airport (BWI).
Marketmore 76 CucumberSlicing cucumber · 58 days to maturity	The UMD Extension published window for slicing cucumber in Central Maryland ran May 15 to Jul 15 and closed 86 days ago, so Marketmore 76 Cucumber is too late to sow this year; the window opens again in May. The UMD Extension window closed on Jul 15, 86 days ago, and that is why this row is here. The frost arithmetic behind it: 58 days to maturity: a sowing today is ready around Dec 6, 50 days after frost. Median first frost Oct 17 at Baltimore/Washington International Airport (BWI).
Black Beauty EggplantEggplant · 80 days to maturity	The UMD Extension published window for eggplant in Central Maryland ran Apr 1 to Apr 30 and closed 162 days ago, so Black Beauty Eggplant is too late to sow this year; the window opens again in April. The UMD Extension window closed on Apr 30, 162 days ago, and that is why this row is here. The frost arithmetic behind it: 80 days to maturity: a sowing today is ready around Dec 28, 72 days after frost. Median first frost Oct 17 at Baltimore/Washington International Airport (BWI).
Lacinato KaleKale · 60 days to maturity	The UMD Extension fall window for kale in Central Maryland closed on Aug 15, 55 days ago, so Lacinato Kale is too late to sow this year: it needs 60 days, and a sowing today matures around Dec 8, 52 days after the median first frost of Oct 17 at Baltimore/Washington International Airport (BWI); this catalog lists kale as frost tolerant, so the crop is harvested through light frost rather than lost to it. The UMD Extension window closed on Aug 15, 55 days ago, and that is why this row is here. The frost arithmetic behind it: 60 days to maturity: a sowing today is ready around Dec 8, 52 days after frost, harvested through light frost. Median first frost Oct 17 at Baltimore/Washington International Airport (BWI).
Early White Vienna KohlrabiKohlrabi · 55 days to maturity	The UMD Extension fall window for kohlrabi in Central Maryland closed on Aug 15, 55 days ago, so Early White Vienna Kohlrabi is too late to sow this year: it needs 55 days, and a sowing today matures around Dec 3, 47 days after the median first frost of Oct 17 at Baltimore/Washington International Airport (BWI); this catalog lists kohlrabi as frost tolerant, so the crop is harvested through light frost rather than lost to it. The UMD Extension window closed on Aug 15, 55 days ago, and that is why this row is here. The frost arithmetic behind it: 55 days to maturity: a sowing today is ready around Dec 3, 47 days after frost, harvested through light frost. Median first frost Oct 17 at Baltimore/Washington International Airport (BWI).
American Flag LeekLeek · 120 days to maturity	The UMD Extension published window for leek in Central Maryland ran Apr 1 to Apr 30 and closed 162 days ago, so American Flag Leek is too late to sow this year; the window opens again in April. The UMD Extension window closed on Apr 30, 162 days ago, and that is why this row is here. The frost arithmetic behind it: 120 days to maturity: a sowing today is ready around Feb 6, 2027, 112 days after frost, harvested through light frost. Median first frost Oct 17 at Baltimore/Washington International Airport (BWI).
Black Seeded Simpson LettuceLeaf lettuce · 45 days to maturity	The UMD Extension fall window for leaf lettuce in Central Maryland closed on Aug 31, 39 days ago, so Black Seeded Simpson Lettuce is too late to sow this year: it needs 45 days, and a sowing today matures around Nov 23, 37 days after the median first frost of Oct 17 at Baltimore/Washington International Airport (BWI); this catalog lists leaf lettuce as frost tolerant, so the crop is harvested through light frost rather than lost to it. The UMD Extension window closed on Aug 31, 39 days ago, and that is why this row is here. The frost arithmetic behind it: 45 days to maturity: a sowing today is ready around Nov 23, 37 days after frost, harvested through light frost. Median first frost Oct 17 at Baltimore/Washington International Airport (BWI).
Southern Giant Curled MustardMustard greens · 45 days to maturity	The UMD Extension fall window for mustard greens in Central Maryland closed on Aug 15, 55 days ago, so Southern Giant Curled Mustard is too late to sow this year: it needs 45 days, and a sowing today matures around Nov 23, 37 days after the median first frost of Oct 17 at Baltimore/Washington International Airport (BWI); this catalog lists mustard greens as frost tolerant, so the crop is harvested through light frost rather than lost to it. The UMD Extension window closed on Aug 15, 55 days ago, and that is why this row is here. The frost arithmetic behind it: 45 days to maturity: a sowing today is ready around Nov 23, 37 days after frost, harvested through light frost. Median first frost Oct 17 at Baltimore/Washington International Airport (BWI).
Clemson Spineless OkraOkra · 56 days to maturity	The UMD Extension published window for okra in Central Maryland ran May 8 to May 31 and closed 131 days ago, so Clemson Spineless Okra is too late to sow this year; the window opens again in May. The UMD Extension window closed on May 31, 131 days ago, and that is why this row is here. The frost arithmetic behind it: 56 days to maturity: a sowing today is ready around Dec 4, 48 days after frost. Median first frost Oct 17 at Baltimore/Washington International Airport (BWI).
Italian Flat Leaf ParsleyParsley · 75 days to maturity	The UMD Extension published window for parsley in Central Maryland ran Apr 1 to Apr 30 and closed 162 days ago, so Italian Flat Leaf Parsley is too late to sow this year; the window opens again in April. The UMD Extension window closed on Apr 30, 162 days ago, and that is why this row is here. The frost arithmetic behind it: 75 days to maturity: a sowing today is ready around Dec 23, 67 days after frost, harvested through light frost. Median first frost Oct 17 at Baltimore/Washington International Airport (BWI).
Hollow Crown ParsnipParsnip · 120 days to maturity	The UMD Extension published window for parsnip in Central Maryland ran Apr 1 to Apr 30 and closed 162 days ago, so Hollow Crown Parsnip is too late to sow this year; the window opens again in April. The UMD Extension window closed on Apr 30, 162 days ago, and that is why this row is here. The frost arithmetic behind it: 120 days to maturity: a sowing today is ready around Feb 6, 2027, 112 days after frost, harvested through light frost. Median first frost Oct 17 at Baltimore/Washington International Airport (BWI).
Sugar Snap PeaSnap pea · 62 days to maturity	The UMD Extension published window for snap pea in Central Maryland ran Mar 15 to Apr 30 and closed 162 days ago, so Sugar Snap Pea is too late to sow this year; the window opens again in March. The UMD Extension window closed on Apr 30, 162 days ago, and that is why this row is here. The frost arithmetic behind it: 62 days to maturity: a sowing today is ready around Dec 10, 54 days after frost, harvested through light frost. Median first frost Oct 17 at Baltimore/Washington International Airport (BWI).
California Wonder PepperSweet pepper · 72 days to maturity	The UMD Extension published window for sweet pepper in Central Maryland ran Mar 15 to Apr 15 and closed 177 days ago, so California Wonder Pepper is too late to sow this year; the window opens again in March. The UMD Extension window closed on Apr 15, 177 days ago, and that is why this row is here. The frost arithmetic behind it: 72 days to maturity: a sowing today is ready around Dec 20, 64 days after frost. Median first frost Oct 17 at Baltimore/Washington International Airport (BWI).
Small Sugar PumpkinPumpkin · 100 days to maturity	The UMD Extension published window for pumpkin in Central Maryland ran May 15 to Jun 15 and closed 116 days ago, so Small Sugar Pumpkin is too late to sow this year; the window opens again in May. The UMD Extension window closed on Jun 15, 116 days ago, and that is why this row is here. The frost arithmetic behind it: 100 days to maturity: a sowing today is ready around Jan 17, 2027, 92 days after frost. Median first frost Oct 17 at Baltimore/Washington International Airport (BWI).
French Breakfast RadishRadish · 28 days to maturity	The UMD Extension fall window for radish in Central Maryland closed on Sep 15, 24 days ago, so French Breakfast Radish is too late to sow this year: it needs 28 days, and a sowing today matures around Nov 6, 20 days after the median first frost of Oct 17 at Baltimore/Washington International Airport (BWI); this catalog lists radish as frost tolerant, so the crop is harvested through light frost rather than lost to it. The UMD Extension window closed on Sep 15, 24 days ago, and that is why this row is here. The frost arithmetic behind it: 28 days to maturity: a sowing today is ready around Nov 6, 20 days after frost, harvested through light frost. Median first frost Oct 17 at Baltimore/Washington International Airport (BWI).
American Purple Top RutabagaRutabaga · 90 days to maturity	The UMD Extension published window for rutabaga in Central Maryland ran Jul 1 to Jul 31 and closed 70 days ago, so American Purple Top Rutabaga is too late to sow this year; the window opens again in July. The UMD Extension window closed on Jul 31, 70 days ago, and that is why this row is here. The frost arithmetic behind it: 90 days to maturity: a sowing today is ready around Jan 7, 2027, 82 days after frost, harvested through light frost. Median first frost Oct 17 at Baltimore/Washington International Airport (BWI).
Bloomsdale SpinachSpinach · 42 days to maturity	The UMD Extension fall window for spinach in Central Maryland closed on Sep 10, 29 days ago, so Bloomsdale Spinach is too late to sow this year: it needs 42 days, and a sowing today matures around Nov 20, 34 days after the median first frost of Oct 17 at Baltimore/Washington International Airport (BWI); this catalog lists spinach as frost tolerant, so the crop is harvested through light frost rather than lost to it. The UMD Extension window closed on Sep 10, 29 days ago, and that is why this row is here. The frost arithmetic behind it: 42 days to maturity: a sowing today is ready around Nov 20, 34 days after frost, harvested through light frost. Median first frost Oct 17 at Baltimore/Washington International Airport (BWI).
Waltham Butternut SquashWinter squash · 95 days to maturity	The UMD Extension published window for winter squash in Central Maryland ran May 15 to Jun 15 and closed 116 days ago, so Waltham Butternut Squash is too late to sow this year; the window opens again in May. The UMD Extension window closed on Jun 15, 116 days ago, and that is why this row is here. The frost arithmetic behind it: 95 days to maturity: a sowing today is ready around Jan 12, 2027, 87 days after frost. Median first frost Oct 17 at Baltimore/Washington International Airport (BWI).
Delicata Winter SquashWinter squash · 100 days to maturity	The UMD Extension published window for winter squash in Central Maryland ran May 15 to Jun 15 and closed 116 days ago, so Delicata Winter Squash is too late to sow this year; the window opens again in May. The UMD Extension window closed on Jun 15, 116 days ago, and that is why this row is here. The frost arithmetic behind it: 100 days to maturity: a sowing today is ready around Jan 17, 2027, 92 days after frost. Median first frost Oct 17 at Baltimore/Washington International Airport (BWI).
Golden Bantam Sweet CornSweet corn · 80 days to maturity	The UMD Extension published window for sweet corn in Central Maryland ran May 1 to Jul 10 and closed 91 days ago, so Golden Bantam Sweet Corn is too late to sow this year; the window opens again in May. The UMD Extension window closed on Jul 10, 91 days ago, and that is why this row is here. The frost arithmetic behind it: 80 days to maturity: a sowing today is ready around Dec 28, 72 days after frost. Median first frost Oct 17 at Baltimore/Washington International Airport (BWI).
Toma Verde TomatilloTomatillo · 70 days to maturity	The UMD Extension published window for tomatillo in Central Maryland ran Mar 20 to Apr 15 and closed 177 days ago, so Toma Verde Tomatillo is too late to sow this year; the window opens again in March. The UMD Extension window closed on Apr 15, 177 days ago, and that is why this row is here. The frost arithmetic behind it: 70 days to maturity: a sowing today is ready around Dec 18, 62 days after frost. Median first frost Oct 17 at Baltimore/Washington International Airport (BWI).
Roma TomatoTomato · 76 days to maturity	The UMD Extension published window for tomato in Central Maryland ran Mar 15 to May 21 and closed 141 days ago, so Roma Tomato is too late to sow this year; the window opens again in March. The UMD Extension window closed on May 21, 141 days ago, and that is why this row is here. The frost arithmetic behind it: 76 days to maturity: a sowing today is ready around Dec 24, 68 days after frost. Median first frost Oct 17 at Baltimore/Washington International Airport (BWI).
Purple Top White Globe TurnipTurnip · 55 days to maturity	The UMD Extension fall window for turnip in Central Maryland closed on Aug 31, 39 days ago, so Purple Top White Globe Turnip is too late to sow this year: it needs 55 days, and a sowing today matures around Dec 3, 47 days after the median first frost of Oct 17 at Baltimore/Washington International Airport (BWI); this catalog lists turnip as frost tolerant, so the crop is harvested through light frost rather than lost to it. The UMD Extension window closed on Aug 31, 39 days ago, and that is why this row is here. The frost arithmetic behind it: 55 days to maturity: a sowing today is ready around Dec 3, 47 days after frost, harvested through light frost. Median first frost Oct 17 at Baltimore/Washington International Airport (BWI).
Sugar Baby WatermelonWatermelon · 80 days to maturity	The UMD Extension published window for watermelon in Central Maryland ran May 15 to Jun 15 and closed 116 days ago, so Sugar Baby Watermelon is too late to sow this year; the window opens again in May. The UMD Extension window closed on Jun 15, 116 days ago, and that is why this row is here. The frost arithmetic behind it: 80 days to maturity: a sowing today is ready around Dec 28, 72 days after frost. Median first frost Oct 17 at Baltimore/Washington International Airport (BWI).

What to do instead

Arugula (Astro Arugula): No frost-tolerant crop from this source is still open in Central Maryland to swap in. UMD Extension opens the arugula window again in August; wait for that rather than sowing now.
Bush bean (Provider Bush Bean): No frost-tolerant crop from this source is still open in Central Maryland to swap in. UMD Extension opens the bush bean window again in May; wait for that rather than sowing now.
Beet (Detroit Dark Red Beet): No frost-tolerant crop from this source is still open in Central Maryland to swap in. UMD Extension opens the beet window again in April; wait for that rather than sowing now.
Bok choy (White Stem Bok Choy): No frost-tolerant crop from this source is still open in Central Maryland to swap in. UMD Extension opens the bok choy window again in August; wait for that rather than sowing now.
Broccoli (Waltham 29 Broccoli): No frost-tolerant crop from this source is still open in Central Maryland to swap in. UMD Extension opens the broccoli window again in June; wait for that rather than sowing now.
Brussels sprouts (Long Island Improved Brussels Sprouts): No frost-tolerant crop from this source is still open in Central Maryland to swap in. UMD Extension opens the brussels sprouts window again in May; wait for that rather than sowing now.
Cabbage (Golden Acre Cabbage): No frost-tolerant crop from this source is still open in Central Maryland to swap in. UMD Extension opens the cabbage window again in June; wait for that rather than sowing now.
Muskmelon (Hale's Best Jumbo Melon): No frost-tolerant crop from this source is still open in Central Maryland to swap in. UMD Extension opens the muskmelon window again in May; wait for that rather than sowing now.
Carrot (Danvers 126 Carrot): No frost-tolerant crop from this source is still open in Central Maryland to swap in. UMD Extension opens the carrot window again in June; wait for that rather than sowing now.
Cauliflower (Snowball Y Cauliflower): No frost-tolerant crop from this source is still open in Central Maryland to swap in. UMD Extension opens the cauliflower window again in June; wait for that rather than sowing now.
Swiss chard (Bright Lights Swiss Chard): No frost-tolerant crop from this source is still open in Central Maryland to swap in. UMD Extension opens the swiss chard window again in April; wait for that rather than sowing now.
Collards (Georgia Southern Collards): No frost-tolerant crop from this source is still open in Central Maryland to swap in. UMD Extension opens the collards window again in June; wait for that rather than sowing now.
Slicing cucumber (Marketmore 76 Cucumber): No frost-tolerant crop from this source is still open in Central Maryland to swap in. UMD Extension opens the slicing cucumber window again in May; wait for that rather than sowing now.
Eggplant (Black Beauty Eggplant): No frost-tolerant crop from this source is still open in Central Maryland to swap in. UMD Extension opens the eggplant window again in April; wait for that rather than sowing now.
Kale (Lacinato Kale): No frost-tolerant crop from this source is still open in Central Maryland to swap in. UMD Extension opens the kale window again in July; wait for that rather than sowing now.
Kohlrabi (Early White Vienna Kohlrabi): No frost-tolerant crop from this source is still open in Central Maryland to swap in. UMD Extension opens the kohlrabi window again in July; wait for that rather than sowing now.
Leek (American Flag Leek): No frost-tolerant crop from this source is still open in Central Maryland to swap in. UMD Extension opens the leek window again in April; wait for that rather than sowing now.
Leaf lettuce (Black Seeded Simpson Lettuce): No frost-tolerant crop from this source is still open in Central Maryland to swap in. UMD Extension opens the leaf lettuce window again in July; wait for that rather than sowing now.
Mustard greens (Southern Giant Curled Mustard): No frost-tolerant crop from this source is still open in Central Maryland to swap in. UMD Extension opens the mustard greens window again in July; wait for that rather than sowing now.
Okra (Clemson Spineless Okra): No frost-tolerant crop from this source is still open in Central Maryland to swap in. UMD Extension opens the okra window again in May; wait for that rather than sowing now.
Parsley (Italian Flat Leaf Parsley): No frost-tolerant crop from this source is still open in Central Maryland to swap in. UMD Extension opens the parsley window again in April; wait for that rather than sowing now.
Parsnip (Hollow Crown Parsnip): No frost-tolerant crop from this source is still open in Central Maryland to swap in. UMD Extension opens the parsnip window again in April; wait for that rather than sowing now.
Snap pea (Sugar Snap Pea): No frost-tolerant crop from this source is still open in Central Maryland to swap in. UMD Extension opens the snap pea window again in March; wait for that rather than sowing now.
Sweet pepper (California Wonder Pepper): No frost-tolerant crop from this source is still open in Central Maryland to swap in. UMD Extension opens the sweet pepper window again in March; wait for that rather than sowing now.
Pumpkin (Small Sugar Pumpkin): No frost-tolerant crop from this source is still open in Central Maryland to swap in. UMD Extension opens the pumpkin window again in May; wait for that rather than sowing now.
Radish (French Breakfast Radish): No frost-tolerant crop from this source is still open in Central Maryland to swap in. UMD Extension opens the radish window again in July; wait for that rather than sowing now.
Rutabaga (American Purple Top Rutabaga): No frost-tolerant crop from this source is still open in Central Maryland to swap in. UMD Extension opens the rutabaga window again in July; wait for that rather than sowing now.
Spinach (Bloomsdale Spinach): No frost-tolerant crop from this source is still open in Central Maryland to swap in. UMD Extension opens the spinach window again in August; wait for that rather than sowing now.
Winter squash (Waltham Butternut Squash): No frost-tolerant crop from this source is still open in Central Maryland to swap in. UMD Extension opens the winter squash window again in May; wait for that rather than sowing now.
Winter squash (Delicata Winter Squash): No frost-tolerant crop from this source is still open in Central Maryland to swap in. UMD Extension opens the winter squash window again in May; wait for that rather than sowing now.
Sweet corn (Golden Bantam Sweet Corn): No frost-tolerant crop from this source is still open in Central Maryland to swap in. UMD Extension opens the sweet corn window again in May; wait for that rather than sowing now.
Tomatillo (Toma Verde Tomatillo): No frost-tolerant crop from this source is still open in Central Maryland to swap in. UMD Extension opens the tomatillo window again in March; wait for that rather than sowing now.
Tomato (Roma Tomato): No frost-tolerant crop from this source is still open in Central Maryland to swap in. UMD Extension opens the tomato window again in March; wait for that rather than sowing now.
Turnip (Purple Top White Globe Turnip): No frost-tolerant crop from this source is still open in Central Maryland to swap in. UMD Extension opens the turnip window again in July; wait for that rather than sowing now.
Watermelon (Sugar Baby Watermelon): No frost-tolerant crop from this source is still open in Central Maryland to swap in. UMD Extension opens the watermelon window again in May; wait for that rather than sowing now.

Sources

University of Maryland Extension, When to Plant Vegetables / Vegetable Planting Calendar for Central Maryland (text-only table) Planting windows for Central Maryland. Retrieved 2026-09-08.
NOAA/NCEI, FREEZE/FROST DATA - CLIM20 supp no. 1, Maryland median first frost for Baltimore/Washington International Airport (BWI) at 36 F, period of record 1971-2000, per the dataset file 9712_frz_prob_1971-2000 in the same NCEI directory; the state PDF itself prints no period of record. Retrieved 2026-09-08.

Keep planning

Central Maryland regional guide Climate signals, planning notes, and priority crops for this region
Planting Calendar Tool Recalculate sowing, transplant, and harvest dates from your own frost dates
What can I still plant in Texas right now? The same answer for Texas; regions use different frost measurements and are not comparable
What can I plant right now? How the frost runway is calculated and which regions are covered